LEPTOTHYRA. 265- 



COLLONIA LENTICULA Gould, 1861. 



Testa minuta, solida, alba, globoso-leuticularis, ubiqiie striis con- 

 fertis tenuissimus cincta ; anfr, 4, depresso-convexis, cito crescentibus ; 

 basi convexo, imperforate, callo copioso munito ; apertura parva,. 

 circularis. Diam. 4, alt. 2 mill. ( Gould.) 



Chinese Seas- 



COLLONIA QUANTILLA Gould, 1861. 



Testa minuta, solida, depresso-orbicularis, rosacea, sulcis pallidior- 

 ibus circ. 4 cincta ; anfr. 4, vix convexis, peripheria obtusa ; basi 

 convexo, pallidiore, arete perforate; apertura circularis; labro 

 crasso ; columella robusta declivi. Diam. 3, alt 2 -f- mill. (Gotilcl.) 



Simons Bay. 



Turbo nocturnus Gould, 1861. 



Testa parvula, globoso-conica, solida, rufo-fuscescente et rosaceo- 

 alternatim strigata ; apice albo ; anfr. 5, convexis, sulcis equalibus 

 aratis ; sutura impressa ; basi convexo, imperforate, concentrioe 

 striate ; apeirtura subcircularis ; columella expansa, argentata, granu- 

 lata, extus erecta. Operculum osseum, pauci-spirale, apice excentrico, 

 extus granulate. Alt. 7 mill. (Gould.) 



Simoda, Japan. 



Evidently not a Leptothyra. Sewerby considers Collonia variegata 

 A. Ad. a synonym ; and gives a figure of a Leptothyra. which might 

 represent almost anything in the genus; but which, together with, 

 his description, certainly has nothing to do with Gould's species. 



